/// <summary>
/// End a progress tracking level. When a transition to zero active levels occurs, then and only then,
/// is a Progressing event raised with a percent value of 100.
/// Calls to NotifyLevelStart() and NotifyLevelFinished() must be balanced.
/// </summary>
public void NotifyLevelFinished()
{
Invariant();
lock (_progressLevelLock)
{
if (_progressLevel == 0)
{
throw new InvalidOperationException("Call to NotifyLevelFinished() without prior call to NotifyLevelStart().");
}
if (--_progressLevel > 0)
{
return;
}
--_progressLevel;
}
ProgressEventArgs e = new ProgressEventArgs(100);
OnProgressing(e);
}
protected virtual void OnProgressing(ProgressEventArgs e)
{
EventHandler<ProgressEventArgs> handler = Progressing;
if (handler != null)
{
_synchronizationContext.Send(
(object state) =>
{
handler(this, (ProgressEventArgs)e);
},
e);
}
}
/// <summary>
/// Add to the count of work having been performed. May lead to a Progressing event.
/// </summary>
/// <param name="count">The amount of work having been performed in this step.</param>
public void AddCount(long count)
{
Invariant();
if (count <= 0)
{
return;
}
lock (_progressLock)
{
_current += count;
if (_stopwatch.Elapsed < _nextProgressTime)
{
return;
}
_nextProgressTime = _stopwatch.Elapsed.Add(ProgressTimeInterval);
}
ProgressEventArgs e = new ProgressEventArgs(Percent);
OnProgressing(e);
}
